The Composting Confessional is a functioning confession booth and two-seater composting privy. It exterior is fabricated from re-purposed materials, such as pallet wood, old doors, cinder blocks, plastic roofing, and flawed blown glass. The interior is made of salvaged bamboo flooring from as high-end interior decorator's dumpster in South Seattle, and resembles a sauna on the interior. There is a thin wall separating the two halves of the confessional, with a small obscuring glass with holes drilled in it for the users to speak through. It stand eight feet tall, by seven feet wide, and six feet deep.

The one caveat to the Confessional is that participants must provide their own bucket to excrete into, as well as their own confessor. A private place for "purging," toilet paper, and composting materials is provided. Because of this, all participants must deal with their own wastes, both spiritual and bodily, when they exit the confessional.